This was originally a level by ybbun, titled Wankel Rotary Engine. I found such a cool 2 off that I wanted to make another version, for everybody to b...
Good one! It can be easy for some, but for me, that was work... So many plausible "cuts" that were no cut and again a different one for the winning... Interesting.
This level as it stands has more than 1 solution. I think I know which one you were intending though - it was an intentional 2-off in the original level.